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3 years ago

The form of energy that can move from place to place across the universe is . On Earth, the main source of this energy is .

2 answers:

5 0

The form of energy that can move from place to place across the universe is light energy. On earth, the main source of this energy is Sun. Most of the light energy comes from the sun because it is the primary source of all the energies. The food, fossil fuels, movement of winds, etc all exists due to Sun. Without sun, there won't be any light energy on the earth. In all the processes which occur on earth has a direct or indirect involvement of light energy which comes from sun.

iren2701 [21]3 years ago

5 0

Answer: Light energy; sunlight

Explanation:

The form of energy that can move from one place to another is light energy. The energy of light depends on the intensity.

Sunlight is the main source of energy on earth, this gives rise to other forms of energy available on earth.

Plants consume light energy to make food which is a source of energy for all other live forms on earth.

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An archer fires an arrow at a castle 230 m away. The arrow is in flight for 6 seconds, then hits the wall of the castle and stic

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Answer:

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(b). The angle is 39.90°.

Explanation:

Given that,

Horizontal distance = 230 m

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Vertical distance = 16 m

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Using formula of horizontal component

$R =u\cos\theta t$

Put the value into the formula

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Using vertical component

$H=u\sin\theta t-\dfrac{1}{2}gt^2$

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Dividing equation (II) and (I)

$\dfrac{u\sin\theta}{u\cos\theta}=\dfrac{32.06}{38.33}$

$\tan\theta=0.8364$

$\theta=\tan^{-1}0.8364$

$\theta=39.90^{\circ}$

(a). We need to calculate the initial speed

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$u\cos\theta\times t=38.33$

Put the value into the formula

$u =\dfrac{230}{6\times\cos39.90}$

$u=49.96\ m/s$

(b). We have already calculate the angle.

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(b). The angle is 39.90°.

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